Tube frame for axminster looms



w. w. ROBERTSON TUBE FRAME FOR AXMINSTER LOOMS Nov. 1, 1938.

Filed Dec. 20, 1957 Inventor Wmiam W- Robertson Attorney Patented Nov. 1, 1938 251354457 TUBE-FBA ME ron AXMIN'STEK 'LQOMS W'iiuanr-w: Robertson, Ngfihborm Mass; as signer d crbm ton sz KndwlsmoonnWorks;

worcestetgmssg setts" a corpc'ir'ation' of Maissachw- Application meember'zo, 1937, Serial No. 180,727

s claimsa (airles 'I hisinvention relates t6- improvements in tube fra'nisfor'Axi'ninster looms and itis the general object of the invention to provide improved means chain.

As hefet'ofofe constructed tube frames have ben'provide'd 'w'ithbrackets of ears comprising twopaits 'eachof-whicl'i engage a transporting; chain"; One of "thse p'arts'is' a guide ear which projects betweefithe'doubk links of the chain and is slotted to receive the second part which is in the forni of a hook'extr i'dirig throughthe slot of the ear "to'lie' over" one of'the lihksOf 'the ch'a'in. The ear is generally'pro'videdwith an ofi s'et at that parttlierof which is slotted and the bending. of the metal together with-the slot weakens the rates of speed and at the same time carry a larger amount oftuft' yarhthanhas been possible heretofore I propose to'use'a time frame of increased cross section to provide the desired-"rigidity. to-

resist vibration'andal seito support the greater weight of the "spoon.

" borne 'by' the hooks which connect the tube frame to'the chain'when the 'tubeirame hangs under the chain, and is supported by the ears when the tube frame is over" the chain;

Iri ord'fto prov idea stronger means for attachihgth' tub'e frame to thefch'ain Ii'propose to mount thehoo'k so tliat thesarr'ie can s1iderela'- ti'vely' to the'tube frame awayifrem the ear with; out passing-thfo'ugh'the latter} BSltlfis construction theear is solid'throughout it'slength and is much stronger than corresponding ears used heretofore.

With the -ho0kldcatdb'e'hind the ear it is 111 a relatively inaccessible position for hand manipulalation, andit is a further objeetbf my inventionto form the hook with finger holds projecting-to a position where they'can be reached toy-the weaver should he desire to removea tube frame from the chain. g V ,1

It is a further objeet'bf fniy mvennontoimser-t into the tubularbariofthe 'tllbe 'flar'rie amnf w bldckagainst WhiGH -tl'i"h66k support slides,

thereby mvenn'ng weapoftne'mor expensive 'tu} a'p'peifa's the description preteens, myizivennon for attaching-the tube frameto the transporting-V This increased Weight is resides in the combination and arrangement of parts" hereinafter described and set forth in'the claims." c g I Ini' the accompanying drawing wherein a convenienfiembodihientcf my invention is set forth,

Fig." 1 is a "fr'ontelevation of 'one'-end of the tube' frame'ma'de according'to my invention 'to-' gether with the spool and clutchyparts being in section," I

Fig.12is 'anend elevation looking in the direc' tibh"of arrow ZjFi. 1, and

'Fig."3"is"a vertical section through the top'of a guide"sprocketfo rf'the "transporting chains; the tube fra1ne"being shown attached to the chain.

Thetubeframe*fo'rming the'subject matter of my, present invention comprises a h0ll0w rectan'gular'barlfiprdvidedwith aseries of yarn tubes I l 'andh'aving a spool bearing I2secured to the 'top thereof. Thisbeari'ng receives the 'gudgeon l3 of'ay'a'r'n spool-shaving'a metallic head. l4."-

fe,transporting chain Mi-is made up of pairs innefliriksof any pair-being shown at 2'! and 22) respectively." The chain moves" under a sprocket 23 which 'ni'ay'be-carried' by the ordinary pull-over shaft of an Axminster loom not shown. Tammie-is ofthe usual construction except that itniay' i f' desired-be =made heavier than the ordinarychain' to carry the enlarged tube frame.

At each 'en'd-of the loom-there is a=clutchC havingan upright wall 25*and alower inwardly and dewnw'ardly inclined lip 26top'a-ss under the adjacent' edge of the tube frame; 7 The clutch may have wings one of which is shown at*2l"to prevent lateral' displacement of'the tube frame and is mounted byrrieansof" a pin" 28 "on "a transporting lev'er29? Oscillation-of the clutch to efiect the so-ca'lled wiping-immovements of the tube frame ar'e'efiected"by a second arm"30 connected piv-' otally to the clutch as at 3|. A'releasing lugi prdj ectsinwardl'yirom'thewall'25 for a purpose to be described. 1 It' is 'to be-'underst0od' that the chain-is moved one'spaee-for each tuft forming operation of the loom-and'that during-this movement the cl'utch will be in the full line position indicated: in Fig; 1. V

In 1 carrying my r invention into effect I provide a -U-shaped slide block 40'- having a vertical web 4i and-topandbottom feet and 43,-which are capableof sliding along the top and bottominner fiatsurfaces- 44 and 45; respectively, of the hol lowbarr A'hook EiFiswelded to the slide block and a stud 5] has a reduced endwhichjextends through the web 4! and thelowerfp'art of the hoek t'o be headed"over as" at EZZthereby" assisting in holding these two parts together. The top of the hollow bar is slotted as at 6! to permit inward sliding of the hook.

A hollow block 65 is secured within the end of the tube frame, as by welding, and has an inner wall 66 serving as a bearing for the left end of the stud 5!. A spring 61 surrounding the pin and interposed between the web .66 and thewall 41 holds the hook yieldingly outwardly against the outer wall 68 of the hollow block, thus limiting outward motion of the hook but permitting the same to be moved inwardly against action of the spring 61. The side walls 69 of the block 65' lie against walls 55 of the tubular bar. In and engage and guide the sides of parts 42 and 43 as the hook slides. Any wear resulting from sliding of block 40 occurs on walls 69 and not on the bar I0.

' The ear or tongue E which projects between the links 2| and 22 may be formed substantially as shown in Figs. 1 and 2 and has the lower end thereof riveted as at 16 to the wall 68. The ear extends upwardly and may be offset slightly as at ll to have a straight upper end 12. The hook 50 has a bent upper end 13 to lie over the link 22, and the relation between the end 13 and the straight end 12 of the ear is very similar to that heretofore used.

In the past it has been customary, however, to mount apart of the hook outside of the ear, but it will be seen by reference to Fig. 1 that I locate all parts of the hook to the left of the ear E. The lower end of the ear is perforated as at 80 and the Wall 68 has a second aligning perforation8l, see Fig. 1, to receive the release lug carried by the clutch.

In the operation of thatpart of my invention thus far described the parts will normally be in the full line position shown in Fig. 1 and as the clutch moves to the left to assume the dotted line position shown in that figure the releasing lug 35 will pass through the perforations 8D and 8| and bear against the end of the pin 5|, thereby caus-.

ing the block 40 and the hook to slide inwardly toward the center of the loom. This is accompanied by movement of the bent end 13 to the left of link 22,after which the clutch may be lowered in the usual manner to present the tube frame to tuft forming position. It is customary to form the lip 26 so thatas the clutch moves in the tube frame is lifted slightly to permit clearance of the hooked end 13 with respect to the link 22, and I retain this feature in my present construction. After the row of tufts has been formed the clutch moves up toward the chain and the straight end 12 will enter between links 2| and 22, after which the clutch will move away from the tube frame and spring 6'! will push the hook from the dotted position of Fig. 1 back to the full line position- Because of the shape of the ear H I find it desirable to modify the construction of the ordinary sprocket I06 found in the overhead of Axminster looms to the extent indicated in Fig. 3. In this figure, where a section is shown through the.

sprocket at one of the double links, the body of the sprocket is offset as at I05 to define apocket I06 into which the ear E may pass as the tube frame moves up on one side of the sprocket. Sprocket I00 is additional to' the pull-over sprocket 23 and is located in the chain support-' ing rack generally located above and behind the prevent wear of the bar I0.

facilitate manual release of a tube frame from shoulders I03 to engage adjacent edges of the single links lying between the double links 2| and 22. These shoulders perform their usual function of preventing excess vibration of the tube frame relatively to the transporting chain. In order to detach a tube frame from the chain the weaver must push the hook inwardly. Since it lies behind the ear E and is narrower than the earit is relatively inaccessible. To facilitate this operation I form lugs III! on the hook, these lugs projecting far enough laterally from the hook to be reached by the weaver.

The parts attached to ear E and extending inside the tubular bar restrain angular motion of the ear relatively to the bar, but this is not the only means by which this result can be accomplished, as will be apparent from 'copending application filed by Payne, Serial No. 180,805.

From the foregoing it will be seen that I have provided a tube frame construction permitting the use of a heavier bar. and also a larger spool, the attaching means for the chain constituting two parts which do not cross each other and do not extend through each'other. This result is accomplished by having the hook lie entirely at one side of the ear and mounting the-hook on a block which is slidable within the hollow bar of the tube frame. It will be apparent from Figs. 1 and 2 that the ear is of considerable strength and can support the increased weight of the tube frame 'due'to the larger bar It and spool S. Furthermoretheside walls of block engagethe parts: 42 and 43 of the block 40 to the chain.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: V

1. 'Inan Axminster loom having .a transporting chain, a tube frame, a bracket secured to the tube frame and extending into engaging ,relation with respect to the chain, a hook to engage the chain located wholly on that side of the bracket which faces the longitudinal center of thetube frame, means defining a sliding bearing between the hook and the tube frame, and means to move the hook away from the ear toward the center of theetube frame.

2. In an Axminster loom having a transport ing chain, a tube frame including a hollow carrier bar rectangular in cross section, an ear fixed with respect to the bar and extending laterally therefrom to engage the chain, a hook for the chain located wholly on that side of the ear facing the longitudinal center of the bar, a slidable bearing block fixed to the hook and located inside the carrier bar, said bearing block engaging interior surfaces of the carrier bar to prevent rotation of the hook in a plane transverse of the axis of the bar, and means to move the block and hook longitudinally of the bar toward the center of the tube frame and away from the ear.

Also, the lugs H0 3. In an Axminster loom having a transport? ing chain, a tube frame comprising a hollow carrier' bar rectangularin cross section, an ear for the tube frame engaging the chain, a bearing member to which the ear is fastened, said hearing member being secured to the carrier bar and located. inside the latter, a hook for engagement with the .chain' located entirely on that side of ing chain, atube frame comprising a hollow car rier bar rectangular in cross section, an ear for the tube frame to engage the chain, a bearing member to which the ear is fastened, said bearing member being secured to the carrier bar and located inside the latter, a hook for engagement with the chain located entirely on that side of the ear which faces the longitudinal center of the carrier bar, a cylindrical guide element secured to the hook and extending through the guide bearing, and a block secured to the hook to engage interior surfaces of the slide bearing to prevent substantial angular motion of the hook in a plane transverse of the axis of the carrier bar.

5. In an Axminster loom having a transporting chain, a tube frame including a hollow carrier bar rectangular in cross section, an ear'at one end of the carrier barsto engage the chain,

a. hollow block secured to the ear and extending into and fixed with respect to the carrier bar, a hook located wholly between the ear and the longitudinal center of the bar, and sliding guide means carried by the hook and located within the hollow block, said sliding guiding means slidable along interior surfaces of the hollow block j to move the hook from the ear toward the center of the tube frame and away from the chain.

6. In an Axminster loom having a transporting chain, a tube frame, an ear fixed with 'respect to the tube frame and extending toward the chain,-said ear being of a substantially uniform width throughout the greater part of the length thereof between the tube frame and the chain, a hook for the tube frame located wholly on that side of the ear which faces the longitudinal center of the tube frame, sliding connections between the hook and the tube frame, said hook being of substantially less width than the ear, and projections extending laterally from the hook to constitute hand holds accessible from that face of the ear remote from the longitudinal center *ofthe tube frame to permit manual sliding of the hook relatively to the tube frame.

WILLIAM W. ROBERTSON. 

